我正在尝试对我的构造函数进行单元测试.在构造函数中,我正在注入一个包含数据并发出http请求的自定义服务.在我的构造函数的save函数中,我通过将构造函数调用到我的自定义服务来实例化作用域上的对象.
我想测试以确保我的自定义服务的构造函数被调用.我试图使用茉莉花间谍窥探构造函数调用,但没有成功.我试图按照Jasmine给出的关于如何在构造函数([Jasmine Spies])1上执行间谍的示例,但它不起作用.
我的控制器定义如下:
controller('comments.EditCtrl', ['$scope', '$location', '$routeParams', 'Comment', function($scope, $location, $routeParams, Comment) {
$scope.save = function(comment) {
$scope.comment = new Comment(comment);
$scope.comment.postId = $routeParams.postId;
Comment.save($scope.comment, function() {
$location.path('/blog/' + $routeParams.postId);
});
};
}])
自定义服务名为“注释”.感兴趣的是
$scope.comment = new Comment(comment);
我无法通过测试来正常工作.我的控制器测试代码如下:
describe('comment.edit', function() {
beforeEach(function() {
module('app');
module('blog.comments');
module('comments.edit');
});
describe('edit controller', function() {
var $scope, editCtrl, Comment, commentNamespace;
var mockComment = {
email: 'spencerdev@maasive.net',
text: 'mock text'
};
beforeEach(inject(function($rootScope, $injector, $controller) {
var routeParamsStub = jasmine.createSpy('routeParamsStub');
routeParamsStub.postId = '7';
Comment = $injector.get('Comment');
commentNamespace = {
Comment: Comment
};
commentNamespace.Comment.save = function(comment, callback) {
callback();
return '';
};
$scope = $rootScope.$new();
editCtrl = $controller('comments.EditCtrl', {
$scope: $scope,
$routeParams: routeParamsStub,
Comment: commentNamespace.Comment
});
}));
it('should have a edit controller', function() {
expect(editCtrl).not.toBe(null);
expect(editCtrl).not.toBe(undefined);
});
describe('save function', function() {
beforeEach(function() {
spyOn(commentNamespace, 'Comment');
$scope.save(mockComment);
});
//TODO: figure out how to spy on Comment constructor call
it('should create a Comment object via its constructor', function() {
expect(commentNamespace.Comment).toHaveBeenCalled();
});
});
});
});
您可以看到我正在尝试按照Jasmine建议创建一个命名空间,然后监视“注释”,以便有希望获取构造函数调用.当我运行测试时,我从Karma收到以下错误消息:
[2013-07-23 21:58:47.720] [DEBUG] config - autoWatch set to false, because of singleRun
INFO [karma]: Karma server started at http://localhost:8080/
INFO [launcher]: Starting browser Chrome
INFO [Chrome 28.0 (Mac)]: Connected on socket id QmSDHIAEJnuGEbe8Zmq3
Chrome 28.0 (Mac) LOG: null
Chrome 28.0 (Mac) comment.edit edit controller save function should create a Comment object via its constructor FAILED
Expected spy constructor to have been called.
Error: Expected spy constructor to have been called.
at null.<anonymous> (/Users/spencer/Projects/angular-blog/src/app/blog/comments/edit/edit.unit.js:68:55)
Chrome 28.0 (Mac): Executed 20 of 20 (1 FAILED) (0.266 secs / 0.092 secs)
Warning: Task "karma:unit" failed. Use --force to continue.
Aborted due to warnings.
我觉得我已经尝试过各种其他策略的组合,例如窥探Comment.prototype.constructor,但我每次都得到相同的消息.有没有人知道如何做到这一点?我知道这里有很多,请告诉我信息中是否有任何漏洞我可能会遗漏一些东西.谢谢
最佳答案 这是由于茉莉花如何安装间谍.当你说spyOn(foo,’bar’)jasmine用一个行为类似于方法的间谍对象替换foo上的bar属性.这意味着当你将commentNamespace.Comment传递给你的控制器时,它已经有了对原始构造函数的引用,所以当你稍后spyOn(commentNamespace,’Comment’)时,为时已晚.